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Complete the square x^2 + 12x + 9

 

Enter your answer in the form a(x + u)^2 + v, where a, u, and v are replaced by numbers.

 Jun 29, 2021
 #1
avatar+33606 
+1

Take 1/2 of the 'x' coeeficient     = 6       then

  (x+6)^2    will be the start   now expand it to:

   x^2 + 12 x + 36  <======   Note that this added 36 to the equation...so we need to subtract 36

 

(x+6)^2   -  36  + 9

(x+6)^2  - 27

 Jun 29, 2021

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